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[Qemu-devel] [PATCH for 4.1 v2 7/7] linux-user: Add support for semtimed
From: |
Aleksandar Markovic |
Subject: |
[Qemu-devel] [PATCH for 4.1 v2 7/7] linux-user: Add support for semtimedop() syscall |
Date: |
Mon, 29 Jul 2019 15:09:51 +0200 |
From: Aleksandar Rikalo <address@hidden>
Add support for semtimedop() emulation. It is based on invocation
of safe_semtimedop().
Conversion is left out of safe_semtimedop(), since other safe_xxx()
usually don't contain similar conversions.
Signed-off-by: Aleksandar Rikalo <address@hidden>
Signed-off-by: Aleksandar Markovic <address@hidden>
---
linux-user/syscall.c | 36 ++++++++++++++++++++++++++++++++++++
1 file changed, 36 insertions(+)
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index ee80175..c7b08f5 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -6650,7 +6650,39 @@ static inline abi_long host_to_target_statx(struct
target_statx *host_stx,
return 0;
}
#endif
+#ifdef TARGET_NR_semtimedop
+static inline abi_long do_semtimedop(int semid, abi_long ptr, unsigned nsops,
+ abi_long timeout)
+{
+ struct sembuf *sops;
+ struct timespec ts, *pts;
+ abi_long ret;
+
+ if (timeout) {
+ pts = &ts;
+ if (target_to_host_timespec(pts, timeout)) {
+ return -TARGET_EFAULT;
+ }
+ } else {
+ pts = NULL;
+ }
+ sops = g_malloc(sizeof(struct sembuf) * nsops);
+ if (sops == NULL) {
+ return -TARGET_EFAULT;
+ }
+
+ if (target_to_host_sembuf(sops, ptr, nsops)) {
+ g_free(sops);
+ return -TARGET_EFAULT;
+ }
+
+ ret = get_errno(safe_semtimedop(semid, sops, nsops, pts));
+ g_free(sops);
+
+ return ret;
+}
+#endif
/* ??? Using host futex calls even when target atomic operations
are not really atomic probably breaks things. However implementing
@@ -9194,6 +9226,10 @@ static abi_long do_syscall1(void *cpu_env, int num,
abi_long arg1,
case TARGET_NR_semop:
return do_semop(arg1, arg2, arg3);
#endif
+#ifdef TARGET_NR_semtimedop
+ case TARGET_NR_semtimedop:
+ return do_semtimedop(arg1, arg2, arg3, arg4);
+#endif
#ifdef TARGET_NR_semctl
case TARGET_NR_semctl:
return do_semctl(arg1, arg2, arg3, arg4);
--
2.7.4
- [Qemu-devel] [PATCH for 4.1 v2 0/7] linux-user: Misc patches for 4.2, Aleksandar Markovic, 2019/07/29
- [Qemu-devel] [PATCH for 4.1 v2 5/7] linux-user: Add support for FDSETEMSGTRESH, FDSETMAXERRS, and FDGETMAXERRS ioctls, Aleksandar Markovic, 2019/07/29
- [Qemu-devel] [PATCH for 4.1 v2 6/7] linux-user: Add support for RNDRESEEDCRNG ioctl, Aleksandar Markovic, 2019/07/29
- [Qemu-devel] [PATCH for 4.1 v2 7/7] linux-user: Add support for semtimedop() syscall,
Aleksandar Markovic <=
- [Qemu-devel] [PATCH for 4.1 v2 1/7] linux user: Add support for FDFLUSH ioctl, Aleksandar Markovic, 2019/07/29
- [Qemu-devel] [PATCH for 4.1 v2 2/7] linux-user: Add support for FDMSGON and FDMSGOFF ioctls, Aleksandar Markovic, 2019/07/29
- [Qemu-devel] [PATCH for 4.1 v2 3/7] linux-user: Add support for FDRESET, FDRAWCMD, FDTWADDLE, and FDEJECT ioctls, Aleksandar Markovic, 2019/07/29
- [Qemu-devel] [PATCH for 4.1 v2 4/7] linux-user: Add support for FDFMTBEG, FDFMTTRK, and FDFMTEND ioctls, Aleksandar Markovic, 2019/07/29